{"schema_version":1,"airport":"HTF","entries":[{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"d0f47fa5d8a3","priority":"fyi","category":"airport","kind":"changed","summary":"cold temperature airport (altitude correction at or below): -19C -> -18C","source":"APT_BASE","fields":[{"field":"CTA","old":"-19C","new":"-18C"}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"8aa8ed310e94","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Cold temperature airport; altitude correction required at or below -18C.","source":"APT_RMK","original":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -18C.","fields":[{"field":"REMARK","old":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -19C.","new":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -18C."}]},{"cycle":"2024-10-03","from_cycle":"2024-09-05","id":"91507425cbf6","priority":"fyi","category":"runway","kind":"changed","summary":"runway 36: controlling obstacle changed (now 13 ft tall, 219 ft from threshold, 182 ft left of centerline, clearance slope 1:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"173","new":"182"},{"field":"DIST_FROM_THR","old":"237","new":"219"},{"field":"OBSTN_CLNC_SLOPE","old":"12","new":"1"},{"field":"OBSTN_HGT","old":"3","new":"13"}]}],"first_cycle":"2024-10-03","last_cycle":"2025-08-07"}